Mathematics · Statistics

Marks obtained by 40 students in a short assessment are given below, where 'a' and 'b' are two missing frequencies: Marks: 5 | 6 | 7 | 8 | 9 No. of students: 6 | a | 16 | 13 | b If the mean of the distribution is 7.2, then the values of a and b respectively are:

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